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 * and Distribution License("CDDL") (collectively, the "License").  You
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package com.sun.ejb.portable;

import java.util.*;
import java.io.Serializable;

/**
 * This class is necessary because neither Vector nor Hashtable
 * return a Serializable Enumeration, which can be sent from the
 * EJB server back to the client.
 * This class must be available at the client too, and it could
 * be instantiated in another vendor's container.
 *
 */

public final class ObjrefEnumeration implements Enumeration, Serializable
{
    private int count=0;
    private ArrayList objrefs;

    // This is called only by the EJB container in the RI.
    public void add(Object obj)
    {
	if ( objrefs == null )
	    objrefs = new ArrayList();
	objrefs.add(obj);
    }

    public boolean hasMoreElements()
    {
	if ( objrefs == null )
	    return false;
	return count < objrefs.size();
    }

    public Object nextElement()
    {
	if ( objrefs != null ) {
	    synchronized (this) {
		if (count < objrefs.size()) {
		    return objrefs.get(count++);
		}
	    }
	}
	throw new NoSuchElementException("ObjrefEnumeration");
    }
}
